Subversion Repositories wimsdev

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<h1>

Logotip stre¾nika WIMS

</h1>

<img src="gifs/logo-160.gif" align="middle" alt="logo"/>

<p>

The curve represents the trace of a point on a disk of radius 1 rotating

inside a fixed circle of radius 3. And the deformation of the curve

represents what happens when the distance of the point towards the center of

the moving disk varies from 0 to infinity.

</p><p>

This animated logo is created by the application 

!href module=tool/geometry/animtrace Tracés animés

 under Wims.

</p>

<ul>

<li>Type of plotting: parametric curve in 2D.

</li><li>

 Equations:

 <pre>

     x=(1-s)*cos(t+pi*s)+s*cos(2*t)

     y=(1-s)*sin(t+pi*s)-s*sin(2*t)

 </pre>

  (where s is the ``sequentiel parameter'' as defined in 

  <span class="wims_emph">Tracés animés</span>.)

</li><li>Ranges of variables:

<pre> -1&lt;x&lt;1, -1&lt;y&lt;1, 0&lt;t&lt;2*pi. </pre>

 </li>

</ul>

<p>You may

!href module=tool/geometry/animtrace.en&cmd=new&type=parametric2D&x1=(1-s)*cos(t+pi*s)+s*cos(2*t)&y1=(1-s)*sin(t+pi*s)-s*sin(2*t)&tleft=0&tright=2*pi&xleft=-1&xright=1&yleft=-1&yright=1&special_parm=noshow load directly these settings

 into the menu of <span class="wims_emph">Tracés animés</span>

to plot it yourself.

</p>

<p class="wimstech">

Date of creation 03-27-1998, © XIAO, Gang.

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<p class="wimscenter">

!href module=home Nazaj na zaèetno stran

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